Ice-cream freezer



C. G. WEN NERSTROM ICE CREAM FREEZER Original Filed Sept. 17, 1921 I j Qg'wemtoz [9 UZM' W/ZM $2) MST l2 s UNITED, STATES P To all whom it mayconcern:

Paten ted Feb. 10, 1925.

ATENT OFFICE.

' om oUs'rAv wnmtnns'rnon, or CHICAGO, ILLINOIS, ASSIGNOR, BY mnsnr. as-

SIGNMENTS, TO THE CREAMERY rncmen MFG. conrm, or CHICAGO, ILLINOIS,

A CORPORATION OF ILLINOIS.

IoE-cnnAn rnnnznn.

Original application filed September 17, 1921, Serial No. 501,359.Divided and this application filed November 8, 1921.

. Be it known that I, CARL GUSTAV VVEN- NERSTROM, a subject of the Kingof Sweden,

- and a residentof the city of Chicago, county .of Cook, State ofIllinois, have invented certain new and useful Improvements in Ice-CreamFreezers, of which the following is a' specification. J I

This invention relates to ice cream freezers of the type shown anddescribed in'my Patent No. 1,447,497, granted March 6, 1923, on'myapplication filed September 17, 1921, bearing Serial Number 501,359, ofwhich this application is a division.

An important object of the invention is to provide a novel arrangementof brine or other freezing medium carrying coils, so constructed anddisposed as to make possible, the maintenance. of a substantiallyuniform temperature throughout the length of the freezing chamber, andto further make possible, efiicient utilization of a freezing mediumhaving a relatively high temperature at the inlet end of said coils.

A further object ofthe inventionis to provide in a device of the abovementioned character, a means cooperatively related to' the brine orfreezing medium carrying coils, whereby the rate of flow of the freezingmedium to and from said coilsmay be simultaneously governed to enablethe operator to maintain 'a given or predetermined temperature withinthe freezing chamber.

Further objects and advantages of the invention will become apparentfrom a study of the following specification when taken in connectionwith the acompany ng drawings in which-- Figure 1 is a side elevation ofa freezer embodyin my invention, a ,portion of the freezing 'giamb'erand housing therefor being broken away to show the relative position ofcertain internal, elements. a

Figure 2 is a side elevation of a plurality'of brine or freezingmedium-carry ng coils, the coils being shown as disposed in an end toend or axial relation about the freezing chamber.

In the drawings the numeral 5 indlcates a base having an elongated head6 upon which is carrieda freezer unit indicated as a whole by thenumeral7, the freezing umt being provided with a pair of brackets 8 Serial No.513,721.

ing cylinder a quantity of cream or other v liquid to be frozen.

llithin the freezing unit 7 there is arranged a suitable agitatingmechanism, comprising dasher and whipping elements, not showmwhich areadapted to be rotated in opposite directions by means of a motor 11mounted-upon the support 9, the power of rotation being transmitted tothe agitating mechanism by means of a suitable transmis sion gearing,not shown, carried within a suitably constructed gear casing indicatedby the numeral 12. a p The freezing unit 7 comprises a pair of endrings, one of which is indicated by the numeral 13, the rings beingarranged to support centrally thereof, a horizontally disposed freezingcylinder 14 into which the cream or other mixture is passed from thesupply tank 10. A plurality of brine or other freezing medium carryingcoils 15 and 16 are disposed about the freezing cylinder 14 in an axialor end to end relation. These coils in cross section are. D-shaped andare 50 arranged as to intimately contact with the outer surface of thefreezing cylinder 14 substantially throughout its length as shown inFigure 2 and areprovided respectivelywith inlet openings 17, 18 and withoutlet opening 19, 20. It will be noted that the inlet openings andoutlet openings of these coils are disposed respectively in par-- allelplanes in order'that the supply conduits and outlet conduits hereinaftermore particularly referred to, may be connected respectively to theinlet and outlet openings in such-a manner as to necessitate the leastpossible number of unions or connections, and to simplify as far aspossible, the arrangement of'the brine or other freezing medium supplyand return pipes. In or der to suitably house or enclose the freezingcylinder 14 and the coils associated of heat by the material while beingfrozen within the freezing cylinder.

The brine or other freezing medium is supplied to the coils 15 and 16from a suitable source of supply through a pipe 23 to which is connecteda delivery pipe 2-1 carrying at its upper end a pair of intake branches25 and 26 which are secured. to the housing 21 and arranged tocommunicate with the coils 15 and 16 through their respective inletopenings 17 and 18. To the housing 21 in a horizontal planesubstantially parallel to the branches 25 and 26, there is connected apair of take-01f conduits 27 and:28 arranged to communicate with thecoils 15 and 16 through their respective outlet openings 19 and 20. Thetake-off pipes 27 and 28 are connected to a single conduit 29 which isadapted to communicate with a shunting pipe 30, connected with thesupply pipe 23, and further adapted to communicate with a return pipe31. By prividing a two-way valve 32 of ordinary construction at thejunction or union of the conduit 29 the shunting pipe 30 and the returnpipe 31, I am enabled to sever communication between the conduit 29 andthe return pipe 31 and'simultaneously establish direct communicationbetween the return pipe 31 and the shunting pipe 30 which communicateswith the supply pipe 23. By severing communication between the conduit29 and the return pipe 31 and establishing communication between thereturn pipe 31 and the shunting pipe 30, the circulation of the brine orother freezing medium through the coils 15 and 16 is discontinued and isreturned to the source of supply.

through the return pipe 31. On the other hand to'circula te the brine orother freezing medium throu h the coils 15 and 16, the valve 32 may e somoved as to sever communication between the shunting pipe 30 and thereturn pipe 31, and simultaneously establish communication between thelatter named pipeand the supplypipe 23 through the conduit 29, thetake-ofi' pipes 27 and 28, the coils 15 and 16, the branch pipes 25 and26, and the delivery pipe 24. Inasmuch as the valve 32 affords asimultaneous opening and closing of the various pipes, one with theother as above described, I am enabled to so var of brine or otherfreezing medium through the coils 15 and 16 as to maintain a constantorsubstantially constant temperature within the freezing cylinder 14,which temperature may be determined or approximated by noting thereadings of the thermometers 33 and 34 which are so disposed asto'indicate the temperature of the brine or other freezing medium as itenters and passes from the coils 15 and 16.

By reason of the fact that I employ a or govern the flow plurality ofindividual freezing coils, each of which surrounds only a relativelyshort portion of the freezing cylinder, I am enabled to efficientlyoperate the machine with a freezing medium having a relatively hightemperature, as compared with the temperature which it is necessary tomaintain in freezing medium employed in similar machines having only a'single coil extending throughout or substantially throughout the lengthof the freezing cylinder, inasmuch as the temperature of the freezingmedium is not so materially affected'during its passage through theserelatively short coils as it would be otherwise, and consequently it maybe introduced at a relatively higher temperature and yet be maintainedat a freezing temperature throughout its length of travel.

I claim:

1. An ice cream freezer comprising a freezing cylinder, a plurality offreezing coils surrounding adjacent freezing zones of said cylinder andadapted to convey a freezing medium, a common means for supplying saidcoils with a freezing medium, a common means for conducting a freezingmedium away from said coils, and means for simultaneously governing theflow of freezing medium to and from said coils.

2. An ice cream freezer comprising a freezing cylinder, a plurality offreezing coils adapted to carry a freezing medium and having inlet andoutlet openings, said coils being coiled around said cylinder and havingflattened surfaces adapted for intimate contact with said cylinder, afreezing medium delivery conduit communicating with all of said coilsthrough their inlet openings, and a freezing medium discharge conduitcommunicating with all of said coils through their outlet openings.

3. An ice cream freezer comprising a freezing cylinder, a plurality offreezing coils adapted to carry a freezing medium and having inlet andoutlet openin said coils being coiled. around said cylin er and havingflattened surfaces adapted for intimate contact with said cylinder, afreezing medium delivery conduit communicating with all of said coils,through their inlet openings, a freezing medium discharge conduitcommunicating with all of said coils through their outlet openings, areturn pipe adapted to communicate with said discharge conduit, andmeans for severing communication between said return pipe and dischargeconduit and simultaneously establishing communication between saidreturn pipe and said delivery ipe.

In testimony whereo I have aifixed my signature to this specification.

CARL GUSTAV WENERSTROM.

